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| 1. general description the TEA1733MT is a low cost switched mo de power supply (smps) controller ic intended for flyback topologies. it operates in fixed frequency mode. frequency jitter has been implemented to reduce electromagnetic interference (emi). slope compensation is integrated for continuous conduction mode (ccm) operation. the TEA1733MT ic includes overpower protec tion (opp). this enables the controller to operate under overpower situations for a limited amount of time. two pins, vinsense and protect, are reserved for protection purposes. input undervoltage protection (uvp) and overvoltage protection (ovp), output ovp and overtemperature protection (otp) can be implemented using a minimal number of external components. at low power levels the primary peak current is set to 25 % of the maximum peak current and the switching frequency is reduced to limit switching losses. the combination of fixed frequency operation at high output power an d frequency reduction at low output power provides high-efficiency over the total load range. the TEA1733MT enables low-cost, highly efficient and reliable supplies for power requirements up to 75 w to be designed easily and with a minimum number of external components. 2. features and benefits 2.1 features ? smps controller ic enablin g low-cost applications ? large input voltage range (12 v to 30 v) ? very low supply current during start-up and restart (typically 10 a) ? low supply current during normal operation (typically 0.55 ma without load) ? overpower or high/low line compensation ? adjustable overpower time-out ? adjustable overpower restart timer ? fixed switching frequency with frequency jitter to reduce emi ? frequency reduction with fixed minimum peak current to maintain high-efficiency at low output power levels ? slope compensation for ccm operation ? low and adjustable overcurrent protection (ocp) trip level TEA1733MT greenchip smps control ic rev. 1 ? 4 february 2011 preliminary data sheet
TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 2 of 20 nxp semiconductors TEA1733MT greenchip smps control ic ? adjustable soft start operation ? two protection inputs (e.g. for inpu t uvp and ovp, otp and output ovp) ? ic overtemperature protection 3. applications ? all applications requiring efficient and co st-effective power supply solutions up to 75 w. 4. ordering information table 1. ordering information type number package name description version TEA1733MT so8 plastic small outline package; 8 leads; body width 3.9 mm sot96-1 TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 3 of 20 nxp semiconductors TEA1733MT greenchip smps control ic 5. block diagram fig 1. block diagram 001aan23 8 overpower correction blank ocp leb vinsense oscillator frequency reduction set max modulation slope compensation analog control soft start 55 a 11 a 8 7 2.5 v 1.2 v / 4.5 v restart vccstart dq vccstop latch reset restart control opp switch otp optimer 5.4 v 7 k max stop set power down clamp drv 3 driver 2 gnd 1 vcc isense 4 q s r driver overpower optimer ctrl protect 5 6 vinsense opp switch clamp latch 21 v 6 v 22 v 12 v 5 v 400 mv 0.50 v/0.80 v 107 a 32 a 107 a prothigh protlow highvin lowvin 3.52 v 0.72 v/0.94 v v ctrl(ipeak) v ctrl(ipeak) v ctrl(ipeak) temperature protection latch stop soft start restart restart vccstop overpower lowvin latch latch reset digital control q s r q s r vccstart power down lowvin protlow otp prothigh protlow overload max count to 8 highvin overload q s r driver stop max prot max prot TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 4 of 20 nxp semiconductors TEA1733MT greenchip smps control ic 6. pinning information 6.1 pinning 6.2 pin description fig 2. pinning diagram sot96-1 (so8) TEA1733MT vcc optimer gnd ctrl driver protect isense vinsense 001aan247 1 2 3 4 6 5 8 7 table 2. pin description symbol pin description vcc 1 supply voltage gnd 2 ground driver 3 gate driver output isense 4 current sense input vinsense 5 input voltage protection input protect 6 general purpose protection input ctrl 7 control input optimer 8 overpower and restart timer TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 5 of 20 nxp semiconductors TEA1733MT greenchip smps control ic 7. functional description 7.1 general control the TEA1733MT contains a flyback circuit controller, a typical configuration of which is shown in figure 3 . 7.2 start-up and underv oltage lockout (uvlo) initially, the capacitor on the vcc pin is charged from the high voltage mains via resistor r3. if v cc is lower than v startup , the ic current consumption is low (typically 10 a). when v cc reaches v startup the ic first waits for pin vinsense to reach the v start(vinsense) voltage and for pin protect to reach the v det(l)(protect) voltage. when both levels are reached, the ic charges the isense pin to the v start(soft) level and starts switching. in a typical application the supply voltage is ta ken over by the auxiliary winding of the transformer. if a protection is triggered the controller st ops switching. dependi ng on the protection triggered, the protection causes a restart or latches the converter to an off-state. a restart caused by a protection rapidly char ges the optimer pin to 4.5 v (typical). the TEA1733MT enters the power-down mode until the optimer pin discharges down to 1.2 v (typical). in power- down mode, the ic consumes a very low supply current (10 a typical) and the vcc pin is clamped at 22 v (typical) by an internal clamp circuit. when the voltage on pin optimer drops below 1.2 v (typical) and the vcc pin voltage is above the vcc start-up voltage (see figure 4 ), the ic restarts. when a latched protection is triggered, the TEA1733MT immediately enters power-down mode. the vcc pin is clamped to a voltage ju st above the latch protection reset voltage (v rst(latch) +1v). fig 3. typical configuration 001aan24 8 TEA1733MT 5 6 7 8 4 3 2 1 r1 r2 r3 r4 z1 c4 r8 c5 r9 c3 c1 c2 r7 c6 r6 r10 s1 r5 driver gnd vcc isense vinsense protect ctrl optimer TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 6 of 20 nxp semiconductors TEA1733MT greenchip smps control ic when the voltage on pin vcc drops below the v th(uvlo) level during normal operation, the controller stops switching. a vcc undervoltage causes the TEA1733MT to be latched in the off-state. 7.3 supply management all internal reference voltages are derived from a temperature compensated on-chip band gap circuit. internal reference currents are derived from a trimmed and temperature compensated current reference circuit. 7.4 input voltage de tection (vinsense pin) in a typical application the mains input volt age can be detected by the vinsense pin. switching will not take place until th e voltage on vinsense has reached the v start(vinsense) voltage (typically 0.94 v). when the vinsense voltage drops below v det(l)(vinsense) (typically 0.72 v) or exceeds v det(h)(vinsense) (typically 3.52 v), the converter stops switching and performs a restart. if pin vinsense is left open or disconnected, the pin is pulled up by the internal 20 na (typical) current source to reach the v det(h)(vinsense) level. this triggers a restart protection. an internal clamp of 5.2 v (typical) pr otects this pin from excessive voltages. 7.5 protection input (protect pin) pin protect is a general purpose input pi n, which can be used to switch off the converter (latched protection). the converter is stopped when the voltage on this pin is pulled above v det(h)(protect) (typically 0.8 v) or below v det(l)(protect) (typically 0.5 v). a current of 32 a (typical) flows out of the chip when the pin voltage is at the v det(l)(protect) level. a current of 107 a (typical) flows into the chip when the pin voltage is at the v det(h)(protect) level. fig 4. start-up sequence, normal operation and restart sequence 014aaa929 starting converter charging vcc capacitor normal operation protection (power down) soft start v cc isense vinsense protect optimer v o restart soft start v startup v th(uvlo) v det(h)(vinsense) v det(h)(protect) v det(l)(protect) 4.5 v 1.2 v TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 7 of 20 nxp semiconductors TEA1733MT greenchip smps control ic the protect input can be used to create an overvoltage detection and otp functions. a small capacitor can be connected to the pin if the protections on this pin are not used. an internal clamp of 4.1 v (typical) pr otects this pin from excessive voltages. 7.6 duty cycle control (ctrl pin) the output power of the converter is regulated by the ctrl pin. this pin is connected to an internal 5.4 v supply using an internal 7 k resistor. the ctrl pin voltage sets the peak current which is measured using the isense pin (see section 7.10 ). at low output power, the switch ing frequency is also reduced (see section 7.12 ). the maximum duty cycle is limited to 72 % (typical). after eight consecutive converter strokes at t he maximum duty cycle, restart protection is activated. typically, this will happen when the mains inpu t supply voltage is removed. 7.7 slope compensation (ctrl pin) a slope compensation circuit is integrated in the ic for ccm. slope compensation guarantees stable operation for duty cycles greater than 50 %. 7.8 overpower timer (optimer pin) if the optimer pin is connected to capacitor c4 (see figure 3 ), a temporary overload situation is allowed. v ctrl(ipeak) (see figure 1 ) is set by pin ctrl. when v ctrl(ipeak) is above 400 mv, the i io(optimer) current (11 a typical) is sourced from the optimer pin. if the voltage on the optimer pin reaches the v prot(optimer) voltage (2.5 v typical) the overpower protection (opp) is triggered (see figure 5 ). when the v prot(optimer) voltage is reached, the TEA1733MT is latched in the off-state. if the overload is removed before the v prot(optimer) voltage is reache d, the converter will continue switching. fig 5. overpower delay: latched 014aaa968 v optimer v isense v o 400 mv protection high load high load normal load v prot(optimer) i o TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 8 of 20 nxp semiconductors TEA1733MT greenchip smps control ic 7.9 current mode control (isense pin) current mode control is used for its good line regulation. the primary current is sensed by the isense pin across an external resistor r9 (see figure 3 ) and compared with an internal control voltage. the internal control voltage is proportional to the ctrl pin voltage (see figure 6 ). leading edge blanking prevents false trig gering due to capacitive discharge when switching on the external power switch (see figure 7 ). 7.10 overpower or high/low line compensation (vinsense and isense pins) the overpower compensation function can be used to realize a maximum output power which is nearly constant over the full input mains. the overpower compensation circuit measures the input voltage on the vinsense pin and outputs a proportionally dependent current on the isense pin. the dc voltage across the soft start re sistor limits the maximum peak curr ent on the current sense resistor (see figure 8 ). fig 6. peak current control fig 7. leading edge blanking frequency reduction 0.2 0.4 0.6 0 04 3 12 014aaa931 v ctrl (v) v sense(max) (v) t leb v sense(max) v isense t 014aaa93 2 TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 9 of 20 nxp semiconductors TEA1733MT greenchip smps control ic at low output power levels the overpowe r compensation circuit is switched off. 7.11 soft start-up (isense pin) a soft start is made to prevent audible noise during start-up or a restart condition. before the converter starts, the soft start capacitor c6 (see figure 3 ) on the isense pin is charged. when the converter starts switching, the primary peak current slowly increases as the soft start capacitor discharges through the soft start resistor (r6, see figure 3 ). the soft start time constant is set by the soft start capacitor value chosen. the soft start resistor value must also be taken into account, but this value is typically defined by the overpower compensation (see section 7.10 ). 7.12 low power operation in low power operation switching losses are reduced by lowering the switching frequency. the converter switching frequency is reduced and the peak current is set to 25 % of the maximum peak current (see figure 6 and figure 9 ). fig 8. overpower compensation 2 1.7 0.68 1234 014aaa93 3 i isense ( a) v vinsense (v) fig 9. frequency control 12 switching frequency 014aaa93 4 v ctrl (v) f sw (khz) TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 10 of 20 nxp semiconductors TEA1733MT greenchip smps control ic 7.13 driver (driver pin) the driver circuit to the gate of the power mosfet has a current so urcing capability of typically ? 300 ma and a current sink capability of ty pically 750 ma. this allows for a fast turn-on and turn-off of the power mosfet for efficient operation. 7.14 overtemperature protection (otp) integrated temperature protection ensures the ic stops switching if the junction temperature exceeds the thermal shutdown temperature limit. otp is a latched protection and it can be reset by removing the voltage on pin vcc. TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 11 of 20 nxp semiconductors TEA1733MT greenchip smps control ic 8. limiting values [1] equivalent to discharging a 100 pf capacitor through a 1.5 k series resistor. [2] equivalent to discharging a 200 pf capacitor through a 0.75 h coil and a 10 resistor. 9. thermal characteristics table 3. limiting values in accordance with the absolute maximum rating system (iec 60134). symbol parameter conditions min max unit voltages v cc supply voltage continuous ? 0.4 +30 v t < 100 ms - 35 v v vinsense voltage on pin vinsense current limited ? 0.4 +5.5 v v protect voltage on pin protect current limited ? 0.4 +5 v v ctrl voltage on pin ctrl ? 0.4 +5 v v io(optimer) input/output voltage on pin optimer ? 0.4 +5 v v isense voltage on pin isense current limited ? 0.4 +5 v currents i cc supply current <10% - 0.4 a i i(vinsense) input current on pin vinsense ? 1+1ma i i(protect) input current on pin protect ? 1+1ma i ctrl current on pin ctrl ? 30 ma i isense current on pin isense ? 10 +1 ma i driver current on pin driver <10% ? 0.4 +1 a general p tot total power dissipation t amb <75 c-0.5w t stg storage temperature ? 55 +150 c t j junction temperature ? 40 +150 c esd v esd electrostatic discharge voltage class 1 human body model [1] -4000v machine model [2] -300v charged device model -750v table 4. thermal characteristics symbol parameter conditions typ unit r th(j-a) thermal resistance from junction to ambient in free air; jedec test board 150 k/w r th(j-c) thermal resistance from junction to case in free air; jedec test board 79 k/w TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 12 of 20 nxp semiconductors TEA1733MT greenchip smps control ic 10. characteristics table 5. characteristics t amb =25 c; v cc = 20 v; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into the ic; unless otherwise specified. symbol parameter conditions min typ max unit supply voltage management (pin v cc ) v startup start-up voltage 18.6 20.6 22.6 v v th(uvlo) undervoltage lockout threshold voltage 11.2 12.2 13.2 v v clamp(vcc) clamp voltage on pin vcc activated during restart - v startup +1 - v activated during latched protection -v rst(latch) +1 - v v hys hysteresis voltage v startup ? v th(uvlo) 89 10v i cc(startup) start-up supply current v cc TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 14 of 20 nxp semiconductors TEA1733MT greenchip smps control ic [1] the clamp voltage on the protect pin is lowered when t he ic is in power-down (latched or restart protection). driver (pin driver) i source(driver) source current on pin driver v driver =2v - ? 0.3 ? 0.25 a i sink(driver) sink current on pin driver v driver = 2 v 0.25 0.3 - a v driver =10v 0.6 0.75 - a v o(driver)max maximum output voltage on pin driver 910.512v temperature protection t pl(ic) ic protection level temperature 130 140 150 c table 5. characteristics ?continued t amb =25 c; v cc = 20 v; all voltages are measured with respect to ground (pin 2); currents are positive when flowing into the ic; unless otherwise specified. symbol parameter conditions min typ max unit TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 15 of 20 nxp semiconductors TEA1733MT greenchip smps control ic 11. application information a power supply with the TEA1733MT is a fl yback converter operating in continuous conduction mode (see figure 10 ). capacitor c5 buffers the ic supply voltage, which is powered via resistor r3 at start-up and via the auxiliary winding during normal operation. sens e resistor r9 converts the current through the mosfet s1 into a voltage on pin isense. the value of r9 defines the maximum primary peak current on mosfet s1. resistor r7 reduces the peak current to capacitor c5. in the example shown in figure 10 , the protect pin is used for ovp and otp. the ovp level is set by diode z1 to v cc = 25.8 v. the otp level is set by negative temperature coefficient (ntc) resistor r4. the vinsense pin is used for mains voltage detection and resistors r1 and r2 set the start voltage to about 80 v (ac). the overpower protection time is defined by capacitor c4 at 60 ms. the restart time is defined by capacitor c4 and resistor r8 at 0.5 s. resistor r6 and capacitor c6 define the soft st art time. resistor r5 prevents the soft start capacitor c6 from being charged during normal operation caused by negative voltage spikes across the curr ent sense resistor r9. capacitor c3 reduces noise on the ctrl pin. fig 10. typical application 001aan24 9 TEA1733MT 5 6 7 8 4 3 2 1 r1 10 m r2 82 k r3 1 m r4 200 k z1 25 v c4 220 nf r8 2.2 m c5 4.7 f r9 0.25 c3 1 nf c1 68 f c2 100 nf r7 10 220 nf c6 22 k r6 10 r10 s1 r5 driver gnd vcc isense vinsense protect ctrl optimer 470 TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 16 of 20 nxp semiconductors TEA1733MT greenchip smps control ic 12. package outline fig 11. package outline sot96-1 (so8) unit a max. a 1 a 2 a 3 b p cd (1) e (2) (1) eh e ll p qz y w v references outline version european projection issue date iec jedec jeita mm inches 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 5.0 4.8 4.0 3.8 1.27 6.2 5.8 1.05 0.7 0.6 0.7 0.3 8 0 o o 0.25 0.1 0.25 dimensions (inch dimensions are derived from the original mm dimensions) notes 1. plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. 2. plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. 1.0 0.4 sot96-1 x w m a a 1 a 2 b p d h e l p q detail x e z e c l v m a (a ) 3 a 4 5 pin 1 index 1 8 y 076e03 ms-012 0.069 0.010 0.004 0.057 0.049 0.01 0.019 0.014 0.0100 0.0075 0.20 0.19 0.16 0.15 0.05 0.244 0.228 0.028 0.024 0.028 0.012 0.01 0.01 0.041 0.004 0.039 0.016 0 2.5 5 mm scale s o8: plastic small outline package; 8 leads; body width 3.9 mm sot96 -1 99-12-27 03-02-18 TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 17 of 20 nxp semiconductors TEA1733MT greenchip smps control ic 13. revision history table 6. revision history document id release date data sheet status change notice supersedes TEA1733MT v.1 20110204 preliminary data sheet - - TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 18 of 20 nxp semiconductors TEA1733MT greenchip smps control ic 14. legal information 14.1 data sheet status [1] please consult the most recently issued document before initiating or completing a design. [2] the term ?short data sheet? is explained in section ?definitions?. [3] the product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple device s. the latest product status information is available on the internet at url http://www.nxp.com . 14.2 definitions draft ? the document is a draft versi on only. the content is still under internal review and subject to formal approval, which may result in modifications or additions. nxp semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall hav e no liability for the consequences of use of such information. short data sheet ? a short data sheet is an extract from a full data sheet with the same product type number(s) and title. a short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. for detailed and full information see the relevant full data sheet, which is available on request vi a the local nxp semiconductors sales office. in case of any inconsistency or conflict with the short data sheet, the full data sheet shall prevail. product specification ? the information and data provided in a product data sheet shall define the specification of the product as agreed between nxp semiconductors and its customer , unless nxp semiconductors and customer have explicitly agreed otherwis e in writing. in no event however, shall an agreement be valid in which the nxp semiconductors product is deemed to offer functions and qualities beyond those described in the product data sheet. 14.3 disclaimers limited warranty and liability ? information in this document is believed to be accurate and reliable. however, nxp semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. in no event shall nxp semiconductors be liable for any indirect, incidental, punitive, special or consequential damages (including - without limitation - lost profits, lost savings, business interrupt ion, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. notwithstanding any damages that customer might incur for any reason whatsoever, nxp semiconductors? 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applications that are described herein for any of these products are for illustrative purpos es only. nxp semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. customers are responsible for the design and operation of their applications and products using nxp semiconductors products, and nxp semiconductors accepts no liability for any assistance with applications or customer product design. it is customer?s sole responsibility to determine whether the nxp semiconductors product is suitable and fit for the customer?s applications and products planned, as well as fo r the planned application and use of customer?s third party customer(s). customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products. nxp semiconductors does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer?s applications or products, or the application or use by customer?s third party customer(s). customer is responsible for doing all necessary testing for the customer?s applic ations and products using nxp semiconductors products in order to av oid a default of the applications and the products or of the application or use by customer?s third party customer(s). nxp does not accept any liability in this respect. limiting values ? stress above one or more limiting values (as defined in the absolute maximum ratings system of iec 60134) will cause permanent damage to the device. limiting values are stress ratings only and (proper) operation of the device at these or any other conditions above those given in the recommended operating conditions section (if present) or the characteristics sections of this document is not warranted. constant or repeated exposure to limiting values will permanently and irreversibly affect the quality and reliability of the device. terms and conditions of commercial sale ? nxp semiconductors products are sold subject to the gener al terms and conditions of commercial sale, as published at http://www.nxp.com/profile/terms , unless otherwise agreed in a valid written individual agreement. in case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. nxp semiconductors hereby expressly objects to applying the customer?s general terms and conditions with regard to the purchase of nxp semiconducto rs products by customer. no offer to sell or license ? nothing in this document may be interpreted or construed as an offer to sell products t hat is open for acceptance or the grant, conveyance or implication of any lic ense under any copyrights, patents or other industrial or intellectual property rights. export control ? this document as well as the item(s) described herein may be subject to export control regulations. export might require a prior authorization from national authorities. document status [1] [2] product status [3] definition objective [short] data sheet development this document contains data from the objecti ve specification for product development. preliminary [short] data sheet qualification this document contains data from the preliminary specification. product [short] data sheet production this docu ment contains the product specification. TEA1733MT all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. preliminary data sheet rev. 1 ? 4 february 2011 19 of 20 nxp semiconductors TEA1733MT greenchip smps control ic non-automotive qualified products ? unless this data sheet expressly states that this specific nxp semicon ductors product is automotive qualified, the product is not suitable for automotive use. it is neither qualified nor tested in accordance with automotive testing or application requirements. nxp semiconductors accepts no liabili ty for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. in the event that customer uses t he product for design-in and use in automotive applications to automotive s pecifications and standards, customer (a) shall use the product without nxp semiconductors? warranty of the product for such automotive applicat ions, use and specifications, and (b) whenever customer uses the product for automotive applications beyond nxp semiconductors? specifications such use shall be solely at customer?s own risk, and (c) customer fully indemnifies nxp semiconductors for any liability, damages or failed product claims resulting from customer design and use of the product for automotive app lications beyond nxp semiconductors? standard warranty and nxp semiconduct ors? product specifications. 14.4 trademarks notice: all referenced brands, produc t names, service names and trademarks are the property of their respective owners. greenchip ? is a trademark of nxp b.v. 15. contact information for more information, please visit: http://www.nxp.com for sales office addresses, please send an email to: salesaddresses@nxp.com nxp semiconductors TEA1733MT greenchip smps control ic ? nxp b.v. 2011. all rights reserved. for more information, please visit: http://www.nxp.com for sales office addresses, please se nd an email to: salesaddresses@nxp.com date of release: 4 february 2011 document identifier: TEA1733MT please be aware that important notices concerning this document and the product(s) described herein, have been included in section ?legal information?. 16. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features and benefits . . . . . . . . . . . . . . . . . . . . 1 2.1 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4 ordering information . . . . . . . . . . . . . . . . . . . . . 2 5 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6 pinning information . . . . . . . . . . . . . . . . . . . . . . 4 6.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 6.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 7 functional description . . . . . . . . . . . . . . . . . . . 5 7.1 general control . . . . . . . . . . . . . . . . . . . . . . . . . 5 7.2 start-up and undervoltage lockout (uvlo) . . 5 7.3 supply management. . . . . . . . . . . . . . . . . . . . . 6 7.4 input voltage detection (vinsense pin) . . . . . 6 7.5 protection input (protect pin) . . . . . . . . . . . 6 7.6 duty cycle control (ctrl pin). . . . . . . . . . . . . . 7 7.7 slope compensation (ctrl pin). . . . . . . . . . . . 7 7.8 overpower timer (optimer pin) . . . . . . . . . . . 7 7.9 current mode control (isense pin) . . . . . . . . . 8 7.10 overpower or high/low line compensation (vinsense and isense pins) . . . . . . . . . . . . 8 7.11 soft start-up (isense pin) . . . . . . . . . . . . . . . . 9 7.12 low power operation . . . . . . . . . . . . . . . . . . . . 9 7.13 driver (driver pin) . . . . . . . . . . . . . . . . . . . . 10 7.14 overtemperature protection (otp) . . . . . . . . 10 8 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 11 9 thermal characteristics . . . . . . . . . . . . . . . . . 11 10 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 12 11 application information. . . . . . . . . . . . . . . . . . 15 12 package outline . . . . . . . . . . . . . . . . . . . . . . . . 16 13 revision history . . . . . . . . . . . . . . . . . . . . . . . . 17 14 legal information. . . . . . . . . . . . . . . . . . . . . . . 18 14.1 data sheet status . . . . . . . . . . . . . . . . . . . . . . 18 14.2 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 14.3 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 14.4 trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 19 15 contact information. . . . . . . . . . . . . . . . . . . . . 19 16 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 |
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